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Figure 2
The chicken-and-egg nature of the ellipse detection problem. Upon identifying some points on the boundary of a candidate ellipse (green crosses), an ellipse can be fitted through these points. Conversely, knowing the parameters of an ellipse, all points on the boundary can be identified (yellow diamonds).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 2| March 2018| Pages 439-450
https://doi.org/10.1107/S1600577518000425
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